Properly fixing the Lost in Time temp sprite issue

svn-id: r43654

engines/gob/save/savehandler.cpp

@@ -229,6 +229,9 @@ int32 TempSpriteHandler::getSize() {
 }
 
 bool TempSpriteHandler::load(int16 dataVar, int32 size, int32 offset) {
+	if (isDummy(size))
+		return true;
+
 	// Sprite available?
 	if (!_sprite)
 		return false;
@@ -274,6 +277,9 @@ bool TempSpriteHandler::load(int16 dataVar, int32 size, int32 offset) {
 bool TempSpriteHandler::save(int16 dataVar, int32 size, int32 offset) {
 	SurfaceDescPtr sprite;
 
+	if (isDummy(size))
+		return true;
+
 	if (!createSprite(dataVar, size, offset, &sprite))
 		return false;
 
@@ -320,6 +326,12 @@ bool TempSpriteHandler::createSprite(int16 dataVar, int32 size,
 	return true;
 }
 
+// A size of 0 means no proper sprite should be saved/loaded,
+// but no error should be thrown either.
+bool TempSpriteHandler::isDummy(int32 size) {
+	return (size == 0);
+}
+
 // A negative size is the flag for using a sprite
 bool TempSpriteHandler::isSprite(int32 size) {
 	return (size < 0);

engines/gob/save/savehandler.h

@@ -144,6 +144,8 @@ public:
 protected:
 	SavePartSprite *_sprite;
 
+	/** Determine whether it's a dummy sprite save/load. */
+	static bool isDummy(int32 size);
 	/** Determine whether using a sprite was requested. */
 	static bool isSprite(int32 size);
 	/** Determine which sprite is meant. */

engines/gob/save/saveload.h

@@ -256,6 +256,7 @@ protected:
 
 	GameHandler *_gameHandler;
 	NotesHandler *_notesHandler;
+	TempSpriteHandler *_tempSpriteHandler;
 	ScreenshotHandler *_screenshotHandler;
 
 	SaveHandler *getHandler(const char *fileName) const;

engines/gob/save/saveload_v3.cpp

@@ -33,8 +33,8 @@ namespace Gob {
 SaveLoad_v3::SaveFile SaveLoad_v3::_saveFiles[] = {
 	{    "cat.inf", kSaveModeSave  , 0, "savegame"},
 	{    "ima.inf", kSaveModeSave  , 0, "screenshot"},
+	{  "intro.$$$", kSaveModeSave  , 0, "temporary sprite"},
 	{   "bloc.inf", kSaveModeSave  , 0, "notes"},
-	{  "intro.$$$", kSaveModeIgnore, 0, "temporary sprite"},
 	{   "prot",     kSaveModeIgnore, 0, 0},
 	{ "config",     kSaveModeIgnore, 0, 0}
 };
@@ -496,17 +496,20 @@ SaveLoad_v3::SaveLoad_v3(GobEngine *vm, const char *targetName, ScreenshotType s
 		_screenshotHandler = new ScreenshotHandler(vm, _gameHandler, sShotType);
 	}
 
+	_tempSpriteHandler = new TempSpriteHandler(vm);
 	_notesHandler = new NotesHandler(2560, vm, targetName);
 
 	_saveFiles[0].handler = _gameHandler;
 	_saveFiles[1].handler = _screenshotHandler;
-	_saveFiles[2].handler = _notesHandler;
+	_saveFiles[2].handler = _tempSpriteHandler;
+	_saveFiles[3].handler = _notesHandler;
 }
 
 SaveLoad_v3::~SaveLoad_v3() {
 	delete _screenshotHandler;
 	delete _gameHandler;
 	delete _notesHandler;
+	delete _tempSpriteHandler;
 }
 
 const SaveLoad_v3::SaveFile *SaveLoad_v3::getSaveFile(const char *fileName) const {